A control device for an ultrafiltration-reverse osmosis apparatus

Abstract

The utility model provides a kind of control device of ultrafiltration- reverse osmosis device, comprising: ultrafiltration flowmeter, ultrafiltration device, ultrafiltration water tank, reverse osmosis liquid inlet flowmeter, reverse osmosis device, bactericide metering pump, scale inhibitor metering pump and reducing agent metering pump, bactericide metering pump is connected with ultrafiltration device, ultrafiltration flowmeter is installed on the pipeline between bactericide metering pump and ultrafiltration device, ultrafiltration device is connected with ultrafiltration water tank, ultrafiltration water tank is connected with reverse osmosis device, reverse osmosis liquid inlet flowmeter, scale inhibitor metering pump and reducing agent metering pump are connected with the pipeline between ultrafiltration water tank and reverse osmosis device respectively.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a control device for an ultrafiltration-reverse osmosis device. Background Technology

[0002] Ultrafiltration-reverse osmosis membrane devices are widely used in wastewater reuse, desalination, and pure water treatment in industries such as petrochemicals, coal chemicals, and power generation. However, existing technologies have the following drawbacks during operation:

[0003] The chemical dosing control is crude: the chemical dosing process often relies on manual experience or fixed dosing patterns, and the dosage and influent flow rate are not regulated in a closed loop, which can easily lead to chemical waste or membrane fouling. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a control device for an ultrafiltration-reverse osmosis device, which addresses the shortcomings of the existing technology.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A control device for an ultrafiltration-reverse osmosis device includes: an ultrafiltration flow meter, an ultrafiltration device, an ultrafiltration water tank, a reverse osmosis feed flow meter, a reverse osmosis device, a bactericide metering pump, a scale inhibitor metering pump, and a reducing agent metering pump. The bactericide metering pump is connected to the ultrafiltration device through a pipeline. The ultrafiltration flow meter is installed on the pipeline between the bactericide metering pump and the ultrafiltration device. The ultrafiltration device is connected to the ultrafiltration water tank through a pipeline. The ultrafiltration water tank is connected to the reverse osmosis device through a pipeline. The reverse osmosis feed flow meter, the scale inhibitor metering pump, and the reducing agent metering pump are respectively connected to the pipeline between the ultrafiltration water tank and the reverse osmosis device through pipelines.

[0006] The beneficial effects of adopting this utility model's technical solution are: by adjusting the dosing pump frequency according to the influent flow rate, precise control of chemical dosing is achieved. This creates a closed-loop regulation between the dosing amount and the influent flow rate, reducing the user's workload, saving chemicals, and reducing pollution.

[0007] Furthermore, the bactericide metering pump, the scale inhibitor metering pump, and the reducing agent metering pump are all equipped with frequency converters. The ultrafiltration flow meter is connected to the frequency converter of the bactericide metering pump, and the reverse osmosis feed flow meter is connected to the frequency converters of the scale inhibitor metering pump and the reducing agent metering pump.

[0008] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: The frequency converter controller of the ultrafiltration flow meter interlocks with the bactericide metering pump, used to automatically adjust the dosage according to the influent flow rate. The frequency converter controllers of the reverse osmosis influent flow meter interlock with the scale inhibitor metering pump and the reducing agent metering pump. By monitoring the influent flow rate in real time through the reverse osmosis influent flow meter and automatically adjusting the frequency of the dosing pump according to a preset algorithm, the dosage is controlled. This ensures that the dosage matches the influent flow rate, improving treatment efficiency.

[0009] Furthermore, the reverse osmosis device is connected to a reverse osmosis permeate flow meter via a pipeline, and both the ultrafiltration flow meter and the reverse osmosis permeate flow meter are connected to a controller.

[0010] The beneficial effects of adopting the above-mentioned further technical solutions are: by monitoring the decrease in the ultrafiltration flow meter, when the decrease exceeds a set threshold, an automatic reminder is given to execute the ultrafiltration chemical cleaning procedure. Similarly, by monitoring the decrease in the reverse osmosis permeate flow meter and the increase in the reverse osmosis pressure differential, when the reverse osmosis permeate flow rate attenuation rate exceeds a set threshold, an automatic reminder is given to execute the reverse osmosis chemical cleaning procedure.

[0011] Furthermore, an ultrafiltration cleaning device is connected to the pipeline between the bactericide metering pump and the ultrafiltration device, and the ultrafiltration cleaning device is connected to the controller.

[0012] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the realization of an ultrafiltration device.

[0013] Furthermore, a reverse osmosis cleaning device is connected to the pipeline between the ultrafiltration water tank and the reverse osmosis device, and the reverse osmosis cleaning device is connected to the controller.

[0014] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the automatic cleaning of the reverse osmosis unit.

[0015] Furthermore, both the ultrafiltration device and the reverse osmosis device are connected to the controller.

[0016] The beneficial effect of adopting the above-mentioned further technical solutions is that it facilitates the automatic start and stop of ultrafiltration devices and reverse osmosis devices.

[0017] Furthermore, the controller is connected to an alarm device.

[0018] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates automatic alarm and realizes automated cleaning early warning.

[0019] Furthermore, a reverse osmosis feed water pressure sensor is connected to the pipeline between the ultrafiltration water tank and the reverse osmosis device. The reverse osmosis device is a multi-stage reverse osmosis device, which is connected to each other by pipelines. A reverse osmosis inter-stage pressure sensor is connected to the pipeline between the multi-stage reverse osmosis devices. A reverse osmosis concentrate pressure sensor is connected to the concentrate end of the reverse osmosis device by pipelines. The reverse osmosis feed water pressure sensor, the reverse osmosis inter-stage pressure sensor, and the reverse osmosis concentrate pressure sensor are all connected to the controller.

[0020] The beneficial effect of adopting the above-mentioned further technical solution is that by monitoring the decrease in the reverse osmosis permeate flow rate and the increase in the reverse osmosis pressure difference, when the reverse osmosis permeate flow rate decay rate exceeds the set threshold, the reverse osmosis chemical cleaning procedure will be automatically prompted.

[0021] Furthermore, a turbidity meter is connected to the pipeline between the ultrafiltration device and the ultrafiltration water tank.

[0022] The beneficial effects of adopting the above-mentioned further technical solutions are: the turbidity meter is used to determine whether the water quality of ultrafiltration permeate is up to standard, thus achieving real-time water quality monitoring.

[0023] Furthermore, an SDI monitoring instrument is connected to the pipeline between the ultrafiltration water tank and the reverse osmosis device.

[0024] The beneficial effects of adopting the above-mentioned further technical solutions are: the SDI monitor is used to determine whether the reverse osmosis feed water quality is up to standard, thus achieving real-time water quality monitoring.

[0025] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the control device of the ultrafiltration-reverse osmosis device provided in the embodiment of this utility model.

[0028] Figure 2 This is one of the schematic flowcharts of the control method for the ultrafiltration-reverse osmosis device provided in the embodiments of this utility model.

[0029] Figure 3This is the second schematic flowchart of the control method for the ultrafiltration-reverse osmosis device provided in the embodiment of this utility model.

[0030] Figure 4 The third schematic flowchart of the control method of the ultrafiltration-reverse osmosis device provided in the embodiment of this utility model.

[0031] Explanation of reference numerals in the attached diagram: 1. Ultrafiltration flow meter; 2. Ultrafiltration unit; 3. Turbidity meter; 4. Ultrafiltration water tank; 5. SDI monitor; 6. Reverse osmosis feed water flow meter; 7. Reverse osmosis feed water pressure sensor; 8. Reverse osmosis unit; 9. Reverse osmosis inter-section pressure sensor; 10. Reverse osmosis concentrate pressure sensor; 11. Reverse osmosis permeate flow meter; 12. Bactericide metering pump; 13. Antiscalant metering pump; 14. Reducing agent metering pump; 15. Ultrafiltration cleaning unit; 16. Reverse osmosis cleaning unit. Detailed Implementation

[0032] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] like Figure 1 As shown in the figure, this utility model embodiment provides a control device for an ultrafiltration-reverse osmosis device, including: an ultrafiltration flow meter 1, an ultrafiltration device 2, an ultrafiltration water tank 4, a reverse osmosis feed flow meter 6, a reverse osmosis device 8, a bactericide metering pump 12, a scale inhibitor metering pump 13, and a reducing agent metering pump 14. The bactericide metering pump 12 is connected to the ultrafiltration device 2 through a pipeline. The ultrafiltration flow meter 1 is installed on the pipeline between the bactericide metering pump 12 and the ultrafiltration device 2. The ultrafiltration device 2 is connected to the ultrafiltration water tank 4 through a pipeline. The ultrafiltration water tank 4 is connected to the reverse osmosis device 8 through a pipeline. The reverse osmosis feed flow meter 6, the scale inhibitor metering pump 13, and the reducing agent metering pump 14 are respectively connected to the pipeline between the ultrafiltration water tank 4 and the reverse osmosis device 8 through pipelines.

[0039] The beneficial effects of adopting this utility model's technical solution are: by adjusting the dosing pump frequency according to the influent flow rate, precise control of chemical dosing is achieved. This creates a closed-loop regulation between the dosing amount and the influent flow rate, reducing the user's workload, saving chemicals, and reducing pollution.

[0040] Users can manually adjust the frequency of the bactericide metering pump, scale inhibitor metering pump, and reducing agent metering pump based on the inlet flow rate measured by the ultrafiltration flow meter and the reverse osmosis inlet flow meter, thereby adjusting the dosage.

[0041] Furthermore, the bactericide metering pump 12, the scale inhibitor metering pump 13, and the reducing agent metering pump 14 are all equipped with frequency converters. The ultrafiltration flow meter 1 is connected to the frequency converter of the bactericide metering pump 12, and the reverse osmosis feed flow meter 6 is connected to the frequency converters of the scale inhibitor metering pump 13 and the reducing agent metering pump 14.

[0042] The beneficial effects of adopting this utility model's technical solution are: It achieves precise control of chemical dosing by adjusting the frequency of the dosing pump according to the influent flow rate. This creates a closed-loop regulation between the dosing amount and the influent flow rate, reducing user workload, saving chemicals, and reducing pollution. The frequency converter controller of the ultrafiltration flow meter interlocks with the bactericide metering pump, automatically adjusting the dosing amount according to the influent flow rate. The frequency converter controllers of the reverse osmosis influent flow meter interlock with the scale inhibitor metering pump and the reducing agent metering pump. By monitoring the influent flow rate in real time through the reverse osmosis influent flow meter and automatically adjusting the frequency of the dosing pump according to a preset algorithm, the dosing amount is controlled. This ensures that the dosing amount matches the influent flow rate, improving treatment efficiency.

[0043] Figure 1 In the diagram, arrows indicate the direction and trajectory of liquid flow. Ultrafiltration flow meter 1 is connected to ultrafiltration feed water via a pipeline. Reverse osmosis unit 8 is connected to reverse osmosis permeate and reverse osmosis concentrate via pipelines. M represents a motor, FIT a flow meter, TUR a turbidity meter, SDI an SDI monitor, and PT a pressure sensor.

[0044] This utility model provides a control device for an ultrafiltration-reverse osmosis device, which can be an intelligent control system for an ultrafiltration-reverse osmosis membrane device, including: an ultrafiltration unit (ultrafiltration device 2), a reverse osmosis unit (reverse osmosis device 8), flow meters (ultrafiltration flow meter 1, reverse osmosis feed water flow meter 6 and reverse osmosis permeate flow meter 11), a turbidity meter 3, an SDI detector (SDI monitor 5), pressure sensors (permeate feed water pressure sensor 7, reverse osmosis inter-section pressure sensor 9 and reverse osmosis concentrate pressure sensor 10), a dosing pump frequency converter (frequency converter controller), and a PLC controller (control center).

[0045] The PLC controller (controller) is configured as follows:

[0046] a. Adjust the dosing pump frequency according to the influent flow rate.

[0047] b. Cleaning warnings are triggered based on the rate of decrease in permeate flow rate of ultrafiltration / reverse osmosis and the increase in reverse osmosis pressure difference.

[0048] c. Determine water quality anomalies by measuring turbidity and SDI values, and then control the treatment unit accordingly.

[0049] d. Integrate a parameter self-calibration algorithm module based on fuzzy logic.

[0050] Furthermore, it includes: an inlet flow interlocking dosing pump frequency converter module (frequency converter controller), used to automatically adjust the dosing amount according to the inlet flow, wherein the frequency of the dosing pump is calculated by the formula F=k*Q+Fbase.

[0051] Furthermore, it also includes: a turbidity detection module, connected to turbidity meter 3, used to determine whether the ultrafiltration permeate water quality is up to standard. It also includes: an SDI detection module, connected to an automatic SDI detector (SDI monitor 5), used to determine whether the reverse osmosis feed water quality is up to standard.

[0052] Furthermore, it also includes an ultrafiltration permeate flow monitoring module, used to automatically remind users to perform an ultrafiltration chemical cleaning procedure by monitoring the decrease in ultrafiltration permeate flow. The ultrafiltration cleaning warning is triggered when the permeate flow rate decreases by ≥15% for 2 consecutive hours (adjustable).

[0053] Furthermore, it also includes a reverse osmosis permeate flow rate and differential pressure monitoring module, used to automatically remind users to execute a reverse osmosis chemical cleaning procedure by monitoring the decrease in reverse osmosis permeate flow rate and the increase in reverse osmosis differential pressure. The reverse osmosis cleaning warning must simultaneously meet the following conditions: permeate flow rate decrease rate ≥10% and membrane differential pressure increase ≥20% (adjustable).

[0054] This utility model provides a control device for an ultrafiltration-reverse osmosis device, which can be an intelligent control system for an ultrafiltration-reverse osmosis membrane device with multi-dimensional intelligent control functions. Through multi-sensor fusion analysis and dynamic parameter optimization algorithms, it can achieve precise control of reagent dosing, adaptive cleaning triggering of membrane modules, and water quality safety early warning functions, thereby realizing efficient operation and precise maintenance of the membrane system.

[0055] like Figure 1 As shown, the reverse osmosis device 8 is further connected to a reverse osmosis permeate flow meter 11 via a pipeline. Both the ultrafiltration flow meter 1 and the reverse osmosis permeate flow meter 11 are connected to a controller, and the controller is connected to an alarm device.

[0056] The beneficial effects of adopting the above-mentioned further technical solutions are: by monitoring the decrease in the ultrafiltration flow meter, when the decrease exceeds a set threshold, an automatic reminder is given to execute the ultrafiltration chemical cleaning procedure. Similarly, by monitoring the decrease in the reverse osmosis permeate flow meter and the increase in the reverse osmosis pressure differential, when the reverse osmosis permeate flow rate attenuation rate exceeds a set threshold, an automatic reminder is given to execute the reverse osmosis chemical cleaning procedure.

[0057] It should be noted that the acquisition, analysis, calculation, comparison, judgment, control and processing methods of the frequency converter and controller are all existing technologies. Those skilled in the art can easily conceive of how to program and implement them according to actual needs, so they will not be elaborated here.

[0058] like Figure 1 As shown, further, an ultrafiltration cleaning device 15 is connected to the pipeline between the bactericide metering pump 12 and the ultrafiltration device 2, and a reverse osmosis cleaning device 16 is connected to the pipeline between the ultrafiltration water tank 4 and the reverse osmosis device 8. The ultrafiltration device 2, the reverse osmosis device 8, the ultrafiltration cleaning device 15, and the reverse osmosis cleaning device 16 are all connected to the controller.

[0059] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the automatic start and stop of ultrafiltration and reverse osmosis devices, and realizes automated cleaning early warning.

[0060] like Figure 1 As shown, further, a reverse osmosis feed water pressure sensor 7 is connected to the pipeline between the ultrafiltration water tank 4 and the reverse osmosis device 8. The reverse osmosis device 8 is a multi-stage reverse osmosis device, and the multi-stage reverse osmosis devices are connected by pipelines. A reverse osmosis inter-stage pressure sensor 9 is connected to the pipeline between the multi-stage reverse osmosis devices. A reverse osmosis concentrate pressure sensor 10 is connected to the concentrate end of the reverse osmosis device 8 by a pipeline. The reverse osmosis feed water pressure sensor 7, the reverse osmosis inter-stage pressure sensor 9, and the reverse osmosis concentrate pressure sensor 10 are all connected to the controller.

[0061] The beneficial effect of adopting the above-mentioned further technical solution is that by monitoring the decrease in the reverse osmosis permeate flow rate and the increase in the reverse osmosis pressure difference, when the reverse osmosis permeate flow rate decay rate exceeds the set threshold, the reverse osmosis chemical cleaning procedure will be automatically prompted.

[0062] like Figure 1 As shown, further, a turbidity meter 3 is connected to the pipeline between the ultrafiltration device 2 and the ultrafiltration water tank 4, and an SDI monitor 5 is connected to the pipeline between the ultrafiltration water tank 4 and the reverse osmosis device 8.

[0063] The beneficial effects of adopting the above-mentioned further technical solutions are: the turbidity meter is used to determine whether the ultrafiltration permeate water quality is up to standard; the SDI monitor is used to determine whether the reverse osmosis feed water quality is up to standard. This achieves dual-indicator detection of water quality and enables real-time water quality monitoring.

[0064] The turbidity meter 3 and the SDI monitor 5 are both connected to the controller.

[0065] By using flow-based chain-linked dosing, analysis of water production performance degradation, and multi-parameter water quality testing, we can achieve precise dosing, automated cleaning early warning, and real-time water quality monitoring.

[0066] The intelligent control system (control device for ultrafiltration-reverse osmosis device) provided in this embodiment of the utility model has the following core modules:

[0067] Data acquisition layer: feed water flow meter (ultrafiltration flow meter 1), ultrafiltration / reverse osmosis permeate flow meter (reverse osmosis feed water flow meter 6 and reverse osmosis permeate flow meter 11), pressure sensor (reverse osmosis feed water pressure sensor 7, reverse osmosis inter-section pressure sensor 9 and reverse osmosis concentrate pressure sensor 10), turbidity meter 3 and SDI detector (SDI monitor 5).

[0068] Control and execution layer: variable frequency dosing pumps (bactericide metering pump 12, scale inhibitor metering pump 13 and reducing agent metering pump 14), chemical cleaning unit (ultrafiltration cleaning device 15 and reverse osmosis cleaning device 16) and PLC controller.

[0069] Algorithm layer: Multi-parameter dynamic adjustment model based on fuzzy PID.

[0070] The control device for the ultrafiltration-reverse osmosis device provided in this embodiment of the utility model can be an intelligent control system for the ultrafiltration-reverse osmosis membrane device. It mainly includes: an ultrafiltration flow meter 1, an ultrafiltration device 2, a turbidity meter 3, an ultrafiltration water tank 4, an SDI monitor 5, a reverse osmosis feed water flow meter 6, a reverse osmosis feed water pressure sensor 7, a reverse osmosis device 8, a reverse osmosis inter-stage pressure sensor 9, a reverse osmosis concentrate pressure sensor 10, a reverse osmosis permeate flow meter 11, a bactericide metering pump 12, a scale inhibitor metering pump 13, a reducing agent metering pump 14, an ultrafiltration cleaning device 15, and a reverse osmosis cleaning device 16.

[0071] The process flow of the control device for the ultrafiltration-reverse osmosis apparatus provided in this embodiment of the invention is mainly as follows:

[0072] 1. The frequency conversion module (frequency conversion controller) of the ultrafiltration flow meter 1 and the bactericide metering pump 12 is used to automatically adjust the dosage according to the influent flow rate.

[0073] 2. Ultrafiltration flow monitoring module, used to monitor the drop in flow rate of ultrafiltration flow meter 1, and automatically remind to execute ultrafiltration chemical cleaning procedure when the drop exceeds the set threshold.

[0074] 3. Turbidity detection module, connected to turbidity meter 3, used to determine whether the ultrafiltration permeate water quality is up to standard.

[0075] 4. SDI detection module, connected to SDI monitor 5, used to determine whether the reverse osmosis feed water quality is up to standard. The system (control device for ultrafiltration-reverse osmosis unit) of this embodiment can achieve comprehensive intelligent control of the ultrafiltration-reverse osmosis membrane unit.

[0076] 5. The reverse osmosis feed water flow meter 6 is linked to the variable frequency module (variable frequency controller) of the scale inhibitor metering pump 13 and the reducing agent metering pump 14. The feed water flow rate is monitored in real time by a sensor (reverse osmosis feed water flow meter 6), and the frequency of the dosing pumps is automatically adjusted according to a preset algorithm to control the dosing amount. This ensures that the dosing amount matches the feed water flow rate, improving treatment efficiency.

[0077] The reverse osmosis permeate flow rate and differential pressure monitoring module is used to monitor the decrease in reverse osmosis permeate flow rate 11 and the increase in reverse osmosis differential pressure ΔP1 and ΔP2. When the reverse osmosis permeate flow rate decay rate exceeds the set threshold, it will automatically remind the user to execute the reverse osmosis chemical cleaning procedure.

[0078] like Figure 2 As shown, this utility model also provides a control method for an ultrafiltration-reverse osmosis device. Based on the control device for the ultrafiltration-reverse osmosis device described above, the control method for the ultrafiltration-reverse osmosis device includes: acquiring real-time feed flow rate and preset dosing strategy; and adjusting the dosing amount according to the real-time feed flow rate and the preset dosing strategy.

[0079] The beneficial effects of this utility model's technical solution are as follows: The flow meter is connected to the frequency converter of the dosing pump via a data cable. The frequency converter has a detailed table pre-set to correspond to different influent flow rates and dosing pump frequencies, based on different water qualities and treatment process requirements. During system operation, the flow meter collects influent flow data in real time and quickly transmits it to the frequency converter. Based on the received flow data, the frequency converter searches for the matching frequency value in the table and adjusts the dosing pump frequency accordingly, achieving precise adjustment of the dosing amount according to the influent flow rate. By dynamically adjusting the dosing rate of scale inhibitors / reducing agents / bactericides through the frequency converter, a positive correlation between the dosing amount and the influent flow rate is ensured. Adjusting the dosing pump frequency according to the influent flow rate achieves precise control of the chemical dosing. This creates a closed-loop regulation between the dosing amount and the influent flow rate, reducing user workload, saving chemicals, and reducing pollution.

[0080] This utility model provides a control method for an ultrafiltration-reverse osmosis device, including: flow-interlocked chemical dosing, water production performance monitoring, dual-index water quality detection, and multi-parameter cleaning and early warning steps.

[0081] Furthermore, the preset dosing strategy is a preset relationship between the influent flow rate and the frequency of the metering pump based on different water qualities and different treatment process requirements; the frequency of the metering pump is calculated by the following formula: F=k*Q+Fbase, where F is the frequency of the metering pump, k is the flow-frequency conversion coefficient, Q is the real-time influent flow rate, and Fbase is the base frequency to ensure the minimum dosing amount.

[0082] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The flow meter is connected to the frequency converter of the dosing pump via a data cable. In the frequency converter, a detailed correspondence table between influent flow rate and dosing pump frequency is pre-set according to different water qualities and treatment process requirements. During system operation, the flow meter collects influent flow rate data in real time and quickly transmits it to the frequency converter. Based on the received flow data, the frequency converter looks up the matching frequency value in the correspondence table and then adjusts the frequency of the dosing pump, achieving precise adjustment of the dosing amount according to the influent flow rate. By dynamically adjusting the dosing rate of scale inhibitor / reducing agent / bactericide through the frequency converter, a positive correlation between the dosing amount and the influent flow rate is ensured. Adjusting the dosing pump frequency according to the influent flow rate achieves precise control of the chemical dosing. This creates a closed-loop regulation between the dosing amount and the influent flow rate, reducing the user's workload, saving chemicals, and reducing pollution.

[0083] Further, after the step of adjusting the dosage based on the real-time influent flow rate and the preset dosing strategy, the process includes: obtaining the real-time ultrafiltration permeate flow rate, the preset normal range of ultrafiltration permeate flow rate, and the first flow rate decrease threshold; determining whether the real-time ultrafiltration permeate flow rate is within the preset normal range of ultrafiltration permeate flow rate; when the real-time ultrafiltration permeate flow rate is within the preset normal range of ultrafiltration permeate flow rate, calculating the first actual attenuation rate based on the real-time ultrafiltration permeate flow rate; determining whether the first actual attenuation rate is less than the first flow rate decrease threshold; and when the first actual attenuation rate is not less than the first flow rate decrease threshold and continues for a preset time, issuing an alarm, shutting down the ultrafiltration device, and starting the ultrafiltration cleaning device.

[0084] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Based on the performance parameters of the ultrafiltration membrane and actual operating experience, a normal range for the ultrafiltration permeate flow rate and a threshold for the flow rate decrease are set. The flow monitoring device continuously transmits the monitored ultrafiltration permeate flow rate data to the controller. When the controller determines that the flow rate decrease exceeds the threshold, it immediately activates the alarm device and sends a reminder message to the operator's mobile terminal, informing them that an ultrafiltration chemical cleaning procedure needs to be performed. If the attenuation rate is not less than the flow rate decrease threshold and continues for a preset time, an audible and visual alarm is triggered, the ultrafiltration device is automatically shut down, and the ultrafiltration chemical cleaning procedure is initiated. The cleaning warning is triggered based on the ultrafiltration permeate flow rate attenuation rate. This is used to automatically remind the operator to perform the ultrafiltration chemical cleaning procedure by monitoring the decrease in the ultrafiltration permeate flow rate, thus automating the cleaning warning process.

[0085] like Figure 2 As shown, 1. Start ultrafiltration and record the initial value after running for 10 minutes; 2. Monitor the flow rate; 3. Determine if the ultrafiltration flow rate attenuation rate is not less than 10%; 4. When the ultrafiltration flow rate attenuation rate is not less than 10%, time for 1 hour; 5. If the flow rate does not recover, perform chemical cleaning; 6. If the flow rate recovers, return to step 2.

[0086] Further, after the step of adjusting the dosage based on the real-time feed flow rate and the preset dosing strategy, the method includes: obtaining the real-time reverse osmosis permeate flow rate, the preset normal range of reverse osmosis permeate flow rate, and the second flow rate decrease threshold; determining whether the real-time reverse osmosis permeate flow rate is within the preset normal range of reverse osmosis permeate flow rate; when the real-time reverse osmosis permeate flow rate is within the preset normal range of reverse osmosis permeate flow rate, calculating the second actual attenuation rate based on the real-time reverse osmosis permeate flow rate; determining whether the second actual attenuation rate is less than the second flow rate decrease threshold; when the second actual attenuation rate is not less than the second flow rate decrease threshold and continues for a preset time, issuing an alarm, shutting down the reverse osmosis unit, and starting the reverse osmosis cleaning unit; or, the step of adjusting the dosage based on the real-time feed flow rate and the preset dosing strategy includes: obtaining the real-time reverse osmosis permeate flow rate, the preset normal range of reverse osmosis permeate flow rate, and the second flow rate decrease threshold; determining whether the real-time reverse osmosis permeate flow rate is within the preset normal range of reverse osmosis permeate flow rate, and calculating the second actual attenuation rate based on the real-time reverse osmosis permeate flow rate; determining whether the second actual attenuation rate is less than the second flow rate decrease threshold and continues for a preset time, issuing an alarm, shutting down the reverse osmosis unit, and starting the reverse osmosis cleaning unit; or, the step of adjusting the dosage based on the real-time feed flow rate and the preset dosing strategy includes: obtaining the real-time reverse osmosis permeate flow rate, the preset normal range of reverse osmosis permeate flow rate, and the second flow rate decrease threshold; determining whether the real-time reverse osmosis permeate flow rate is within the preset normal range of reverse osmosis permeate After adjusting the dosage based on the real-time feed flow rate and the preset dosing strategy, the process includes: acquiring the real-time feed water pressure, the real-time inter-section pressure, the real-time concentrate pressure, the preset normal range of reverse osmosis pressure difference, and the pressure difference increase threshold of the reverse osmosis unit; calculating the first real-time pressure difference between the feed water end and the inter-section end of the reverse osmosis unit, and the second real-time pressure difference between the inter-section end and the concentrate end of the reverse osmosis unit, based on the real-time feed water pressure, the real-time inter-section pressure, and the real-time concentrate pressure; determining whether the first real-time pressure difference and the second real-time pressure difference are within the preset normal range of reverse osmosis pressure difference; and determining whether the first real-time pressure difference and the second real-time pressure difference are within the preset normal range of reverse osmosis pressure difference. When the real-time differential pressure is within the preset normal range of reverse osmosis differential pressure, the third actual attenuation rate and the fourth actual attenuation rate are calculated based on the first real-time differential pressure and the second real-time differential pressure, respectively; it is determined whether the third actual attenuation rate and the fourth actual attenuation rate are less than the differential pressure increase threshold; when the third actual attenuation rate or the fourth actual attenuation rate is not less than the differential pressure increase threshold, an alarm is triggered, the reverse osmosis unit is shut down, and the reverse osmosis cleaning unit is started; or, after the step of adjusting the dosage according to the real-time feed flow rate and the preset dosing strategy, the following steps are included: obtaining the real-time feed water pressure of the reverse osmosis unit, the real-time inter-stage pressure of the reverse osmosis unit, the real-time concentrate pressure of the reverse osmosis unit, the preset normal range of reverse osmosis differential pressure, and the differential pressure. Increase the amplitude threshold; calculate the first real-time pressure difference between the inlet and inter-section ends of the reverse osmosis unit and the second real-time pressure difference between the inter-section end and the concentrate end of the reverse osmosis unit based on the real-time inlet pressure, the real-time inter-section end pressure, and the real-time concentrate end pressure of the reverse osmosis unit; determine whether the first and second real-time pressure differences are within the preset normal range of reverse osmosis pressure differences; when both the first and second real-time pressure differences are within the preset normal range of reverse osmosis pressure differences, calculate the third and fourth actual attenuation rates based on the first and second real-time pressure differences respectively; determine whether the third and fourth actual attenuation rates are less than the pressure difference increase amplitude threshold;A first-level warning is issued when either the third or fourth actual attenuation rate is not less than the differential pressure increase threshold and persists for a preset time; the real-time reverse osmosis permeate flow rate, the preset normal range of reverse osmosis permeate flow rate, and the second flow rate decrease threshold are obtained; it is determined whether the real-time reverse osmosis permeate flow rate is within the preset normal range; when the real-time reverse osmosis permeate flow rate is within the preset normal range, the second actual attenuation rate is calculated based on the real-time reverse osmosis permeate flow rate; it is determined whether the second actual attenuation rate is less than the second flow rate decrease threshold; when the second actual attenuation rate is not less than the second flow rate decrease threshold and persists for a preset time, a second-level warning is issued; when both the first-level and second-level warnings occur, the reverse osmosis unit is shut down, and the reverse osmosis cleaning unit is started.

[0087] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: Based on the characteristics of the reverse osmosis membrane and the system design requirements, a normal range for the reverse osmosis permeate flow rate and a threshold for the flow rate decrease are set. If a normal flow rate range is set, the flow monitoring equipment collects the reverse osmosis permeate flow rate data in real time and transmits it to the controller. Once the controller detects that the flow rate decrease exceeds the threshold, it immediately triggers an alert mechanism, notifying staff to perform a reverse osmosis chemical cleaning procedure through audible and visual alarms, system pop-ups, and SMS notifications. Alternatively, based on the operating parameters and experience data of the reverse osmosis membrane, a normal range for the reverse osmosis differential pressure and a threshold for the differential pressure increase are set. Pressure sensors monitor the pressure at the inlet, inter-stage, concentrate, and outlet ends in real time and transmit the pressure data to the controller. The controller calculates the differential pressure and compares it with the preset range and threshold. When the differential pressure increase exceeds the threshold, the controller immediately issues a cleaning alert signal, reminding staff to perform timely chemical cleaning of the reverse osmosis system. Alternatively, the reverse osmosis membrane differential pressure is monitored in real time. If the increase in the reverse osmosis membrane differential pressure from the initial value is not less than the differential pressure increase threshold, a first-level warning is triggered. The reverse osmosis permeate flow rate is continuously monitored, and the decay rate per unit time is calculated. If the attenuation rate is not less than the flow rate decrease threshold and continues for a preset time, a secondary warning is triggered. When both primary and secondary warning conditions are met simultaneously, an audible and visual alarm is triggered, the reverse osmosis unit is automatically shut down, and the reverse osmosis cleaning procedure is initiated. The cleaning warning is triggered based on the attenuation rate of the reverse osmosis permeate flow rate and the increase in the reverse osmosis pressure differential. By monitoring the decrease in the reverse osmosis permeate flow rate and the increase in the reverse osmosis pressure differential, the system automatically prompts for the execution of the reverse osmosis chemical cleaning procedure.

[0088] like Figure 3As shown, the steps are as follows: 1. Start reverse osmosis and record initial values ​​after 10 minutes of operation; 2. Monitor pressure and flow rate; 3. Check if the reverse osmosis membrane differential pressure increases by more than or equal to 10%; 4. When the reverse osmosis membrane differential pressure increases by more than or equal to 10%, time for 10 minutes; 5. If the differential pressure does not recover, trigger a level 1 alarm; 6. Determine if the reverse osmosis flow rate decay rate is more than or equal to 10%; 7. When the reverse osmosis flow rate decay rate is more than or equal to 10%, time for 1 hour; 8. If the flow rate does not recover, trigger a level 2 alarm and perform chemical cleaning.

[0089] Step 4 is followed by: If the pressure differential recovers, return to step 2.

[0090] Step 7 is followed by: If traffic is restored, return to step 6.

[0091] Step 2 includes: 11. Determine if the reverse osmosis flow rate attenuation rate is greater than or equal to 10%; 12. When the reverse osmosis flow rate attenuation rate is greater than or equal to 10%, start timing for 1 hour; 13. If the flow rate does not recover, trigger a secondary alarm and perform chemical cleaning.

[0092] Step 12 is followed by step 2 if traffic is restored.

[0093] Further, after the step of adjusting the dosage based on the real-time influent flow rate and the preset dosing strategy, the process includes: obtaining the real-time ultrafiltration permeate turbidity and a preset turbidity acceptable range; determining whether the real-time ultrafiltration permeate turbidity exceeds the preset turbidity acceptable range; when the real-time ultrafiltration permeate turbidity exceeds the preset turbidity acceptable range, starting the ultrafiltration cleaning device and adjusting the dosage or strengthening the filtration measures; obtaining the real-time reverse osmosis feed water quality SDI and a preset reverse osmosis feed water quality SDI; determining whether the real-time reverse osmosis feed water quality SDI is greater than the preset reverse osmosis feed water quality SDI; when the real-time reverse osmosis feed water quality SDI is greater than the preset reverse osmosis feed water quality SDI, increasing the filtration intensity or adjusting the influent flow rate.

[0094] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Turbidity and SDI values ​​are used to determine water quality anomalies and trigger coordinated control of the treatment unit. A turbidity acceptable range is set based on the water quality standards for ultrafiltration permeate. The turbidity meter monitors the turbidity of the ultrafiltration permeate in real time and transmits the turbidity data to the controller. The controller compares the real-time turbidity data with the acceptable range. If the turbidity exceeds the acceptable range, the controller determines that the ultrafiltration permeate water quality is unqualified and can automatically initiate the ultrafiltration backwashing program, while simultaneously adjusting the dosage of chemicals in the pretreatment stage or strengthening filtration measures. Based on the feed water requirements of the reverse osmosis membrane, the SDI of the reverse osmosis feed water is set. The SDI monitor detects the SDI value in real time and transmits it to the controller. When the controller detects that the SDI value is greater than the preset reverse osmosis feed water quality SDI, it determines that the reverse osmosis feed water quality is unqualified and then automatically increases the filtration intensity of the pretreatment stage or adjusts the feed water flow rate according to the preset strategy to improve the feed water quality and ensure the stable operation of the reverse osmosis system.

[0095] 1. Implementation of Inlet Water Flow Rate-Dosing Pump Frequency Conversion Linkage: A high-precision flow sensor is installed near the raw water inlet on the inlet pipeline to ensure accurate measurement of the inlet water flow rate. The flow sensor (flow meter) is connected to the frequency converter of the dosing pumps (bactericide metering pump 12, scale inhibitor metering pump 13, and reducing agent metering pump 14) via a data cable. A detailed correspondence table between inlet water flow rate and dosing pump frequency is pre-set in the frequency converter according to different water qualities and treatment process requirements. During system (ultrafiltration-reverse osmosis unit) operation, the flow sensor collects inlet water flow rate data in real time and quickly transmits it to the frequency converter. Based on the received flow data, the frequency converter looks up the matching frequency value in the correspondence table and adjusts the frequency of the dosing pumps accordingly, achieving precise adjustment of the dosing amount based on the inlet water flow rate. Flow meters can be installed on the outlet pipelines of scale inhibitor metering pump 13 and reducing agent metering pump 14, respectively.

[0096] Flow-based dosing control:

[0097] (1) Real-time collection of ultrafiltration influent flow rate Q, and calculation of dosing pump frequency F using the formula:

[0098] F = k * Q + Fbase, where k is the flow-frequency conversion coefficient and Fbase is the base frequency that ensures the minimum dosage.

[0099] (2) The dosing rate of scale inhibitor / reducing agent / bactericide is dynamically adjusted by the frequency converter (frequency controller) to ensure that the dosage is positively correlated with the flow rate (inlet flow rate).

[0100] 2. Implementation of Ultrafiltration Permeate Flow Monitoring and Cleaning Reminders: Install the flow monitoring device on the ultrafiltration permeate pipeline near the outlet of the ultrafiltration membrane module to ensure accurate monitoring of the ultrafiltration permeate flow rate. At the system control center (controller), based on the performance parameters of the ultrafiltration membrane and actual operating experience, set the normal flow range and flow rate drop threshold for the ultrafiltration permeate. For example, within the normal flow range, the flow rate drop threshold can be 10%. The flow monitoring device continuously transmits the monitored ultrafiltration permeate flow data to the control center (controller). When the control center determines that the flow rate drop exceeds 10%, it immediately activates the audible and visual alarm (alarm device) and sends a reminder message to the staff's mobile terminal, informing them that an ultrafiltration chemical cleaning procedure is required. A flow meter can be installed on the pipeline between ultrafiltration unit 2 and ultrafiltration water tank 4.

[0101] Ultrafiltration cleaning warning:

[0102] (1) Continuously monitor the ultrafiltration flow rate QUF and calculate the decay rate η per unit time:

[0103] η = (QUF initial - QUF real time) / QUF initial × 100%.

[0104] (2) If η≥10% and lasts for 1 hour (adjustable), the process is as follows: trigger the audible and visual alarm, automatically shut down the ultrafiltration device 2, and start the ultrafiltration chemical cleaning program.

[0105] 3. Implementation of Reverse Osmosis Permeate Flow Monitoring and Cleaning Reminders: A flow monitoring device is installed at the permeate outlet of the reverse osmosis membrane module near the reverse osmosis permeate pipeline. At the control center (controller), based on the characteristics of the reverse osmosis membrane and system design requirements, a normal range for the reverse osmosis permeate flow rate and a threshold for flow rate decline are set. For example, within the normal flow rate range, the threshold for flow rate decline is set at 10%. The flow monitoring device collects reverse osmosis permeate flow rate data in real time and transmits it to the control center. Once the control center detects a flow rate decline exceeding 10%, an alert mechanism is immediately triggered, notifying staff to perform the reverse osmosis chemical cleaning procedure via audible and visual alarms, system pop-ups, and SMS notifications.

[0106] 4. Implementation of Reverse Osmosis Differential Pressure Monitoring and Cleaning Reminder: High-precision pressure sensors are installed at the inlet, inter-stage, concentrate, and outlet ends of the reverse osmosis system. These pressure sensors are connected to the control center via data cables. Based on the operating parameters of the reverse osmosis membrane and empirical data, the control center sets the normal range for the reverse osmosis differential pressure and a threshold for the increase in differential pressure. For example, within the normal range, the threshold for the increase in differential pressure is set to 0.1 MPa. The pressure sensors monitor the pressure at the inlet, inter-stage, concentrate, and outlet ends in real time and transmit the pressure data to the control center. The control center calculates the differential pressure and compares it with the preset range and threshold. When the increase in differential pressure exceeds 0.1 MPa, the control center immediately issues a cleaning reminder signal, prompting personnel to perform timely chemical cleaning of the reverse osmosis system. Specifically, a reverse osmosis effluent pressure sensor can be installed at the outlet end of reverse osmosis unit 8.

[0107] Reverse osmosis cleaning multi-parameter early warning:

[0108] (1) Membrane pressure difference increase: Real-time monitoring of reverse osmosis membrane pressure difference ΔP. If ΔP increases by ≥10% compared to the initial value, a first-level warning is triggered.

[0109] ΔP1 = PRO inlet water - PRO section interval,

[0110] ΔP2 = PRO intersegment - PRO concentrate.

[0111] (2) Permeate flow rate decay: Continuously monitor the reverse osmosis permeate flow rate QRO and calculate the decay rate η per unit time. If η ≥ 10% and lasts for 1 hour (adjustable), trigger a level 2 warning.

[0112] η = (QRO initial - QRO real time) / QRO initial × 100%.

[0113] (3) When both Level 1 and Level 2 warning conditions are met, the following process is executed: trigger the audible and visual alarm, automatically shut down the reverse osmosis unit 8, and start the reverse osmosis cleaning program.

[0114] 5. Implementation of Turbidity Judgment for Ultrafiltration Permeate Water: Install turbidity meter 3 on the ultrafiltration permeate pipeline to ensure accurate sampling of the ultrafiltration permeate water. At the control center, set the acceptable turbidity range (e.g., 0-0.5 NTU) based on the ultrafiltration permeate water quality standards. The turbidity meter monitors the turbidity of the ultrafiltration permeate water in real time and transmits the turbidity data to the control center (controller). The control center compares the real-time turbidity data with the acceptable range. If the turbidity exceeds 0.5 NTU, the control center determines that the ultrafiltration permeate water quality is unacceptable and can automatically initiate the ultrafiltration backwashing program, while simultaneously adjusting the dosage of chemicals in the pretreatment stage or strengthening filtration measures.

[0115] 6. Implementation of SDI Judgment for Reverse Osmosis Feed Water: An automatic SDI detector (SDI monitor 5) is installed on the reverse osmosis feed water pipeline to ensure accurate detection of the SDI value of the feed water. At the control center, an SDI15 value range is set according to the feed water requirements of the reverse osmosis membrane, such as less than 3.0. The automatic SDI detector (SDI monitor 5) monitors the SDI value in real time and transmits it to the control center. When the control center detects an SDI value greater than 3.0, it determines that the reverse osmosis feed water quality is unqualified and automatically increases the filtration intensity of the pretreatment stage or adjusts the feed water flow rate according to a preset strategy to improve the feed water quality and ensure the stable operation of the reverse osmosis system.

[0116] The above-mentioned intelligent control system and method (control device and method for ultrafiltration-reverse osmosis device) can realize the intelligent and precise operation of ultrafiltration-reverse osmosis membrane device (ultrafiltration-reverse osmosis device), significantly improve the system's processing efficiency, reduce operating costs, and extend the service life of the membrane system.

[0117] Compared with current membrane device control system technology, it has the following advantages and positive effects:

[0118] Precision dosing: linear matching of flow rate and dosage, improving drug utilization rate by more than 30%.

[0119] Intelligent cleaning: Based on the multi-parameter fusion judgment of flow rate attenuation and pressure difference increase, the accuracy of membrane fouling identification is improved by 50%.

[0120] Double protection for water quality: online monitoring of both turbidity and SDI indicators shortens the response time for water quality anomalies to within 10 minutes.

[0121] Extend membrane life: Precise cleaning strategies extend the chemical cleaning cycle of ultrafiltration / reverse osmosis membranes by 40%-50%.

[0122] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A control device for an ultrafiltration-reverse osmosis unit, characterized in that, include: The device includes an ultrafiltration flow meter (1), an ultrafiltration unit (2), an ultrafiltration water tank (4), a reverse osmosis feed flow meter (6), a reverse osmosis unit (8), a bactericide metering pump (12), a scale inhibitor metering pump (13), and a reducing agent metering pump (14). The bactericide metering pump (12) is connected to the ultrafiltration unit (2) via a pipeline. The ultrafiltration flow meter (1) is installed on the pipeline between the bactericide metering pump (12) and the ultrafiltration unit (2). The ultrafiltration unit (2) is connected to the ultrafiltration water tank (4) via a pipeline. The ultrafiltration water tank (4) is connected to the reverse osmosis unit (8) via a pipeline. The reverse osmosis feed flow meter (6), the scale inhibitor metering pump (13), and the reducing agent metering pump (14) are respectively connected to the pipeline between the ultrafiltration water tank (4) and the reverse osmosis unit (8) via pipelines.

2. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 1, characterized in that, The bactericide metering pump (12), the scale inhibitor metering pump (13), and the reducing agent metering pump (14) are all equipped with frequency converters. The ultrafiltration flow meter (1) is connected to the frequency converter of the bactericide metering pump (12), and the reverse osmosis feed flow meter (6) is connected to the frequency converters of the scale inhibitor metering pump (13) and the reducing agent metering pump (14).

3. The control device for an ultrafiltration-reverse osmosis system according to claim 1, characterized in that, The reverse osmosis device (8) is connected to a reverse osmosis permeate flow meter (11) via a pipeline. Both the ultrafiltration flow meter (1) and the reverse osmosis permeate flow meter (11) are connected to a controller.

4. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 3, characterized in that, An ultrafiltration cleaning device (15) is connected to the pipeline between the bactericide metering pump (12) and the ultrafiltration device (2), and the ultrafiltration cleaning device (15) is connected to the controller.

5. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 3, characterized in that, A reverse osmosis cleaning device (16) is connected to the pipeline between the ultrafiltration water tank (4) and the reverse osmosis device (8), and the reverse osmosis cleaning device (16) is connected to the controller.

6. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 3, characterized in that, Both the ultrafiltration device (2) and the reverse osmosis device (8) are connected to the controller.

7. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 3, characterized in that, The controller is connected to an alarm device.

8. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 3, characterized in that, A reverse osmosis feed water pressure sensor (7) is connected to the pipeline between the ultrafiltration water tank (4) and the reverse osmosis device (8). The reverse osmosis device (8) is a multi-stage reverse osmosis device, which is connected to each other by pipelines. A reverse osmosis inter-stage pressure sensor (9) is connected to the pipeline between the multi-stage reverse osmosis devices. A reverse osmosis concentrate pressure sensor (10) is connected to the concentrate end of the reverse osmosis device (8) by pipelines. The reverse osmosis feed water pressure sensor (7), the reverse osmosis inter-stage pressure sensor (9), and the reverse osmosis concentrate pressure sensor (10) are all connected to the controller.

9. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 1, characterized in that, A turbidity meter (3) is connected to the pipeline between the ultrafiltration device (2) and the ultrafiltration water tank (4).

10. The control device for an ultrafiltration-reverse osmosis apparatus according to claim 1, characterized in that, An SDI monitor (5) is connected to the pipeline between the ultrafiltration water tank (4) and the reverse osmosis device (8).

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